Through the streets of Marylebone in London, where the legendary Harley Street - the world's epicentre of private medicine - rises up, Iain De Havilland walks every month in support of The Real Mental Health Foundationthe organisation founded by his friend Shawn Lesser. There, between steps and purpose, he recalls how a commitment to mental health led him to discover a molecule that would change his life: the NAD+.
"It all started with the need to understand why people, even the most successful ones, fall apart inside," explains the founder of NAD Clinictoday an international reference in longevity medicine. "Chronic fatigue, emotional exhaustion, loss of mental clarity... are signs that our cellular system is crying out for help. NAD+ is one of the keys to restoring that vital energy".
More than longevity: cellular and mental resilience
The NAD+ (nicotinamide adenine dinucleotide) is an essential coenzyme involved in thousands of metabolic reactions and DNA repair processes. Its levels decrease with age, stress and overwork, accelerating biological ageing. "When we replenish NAD+ in combination with antioxidants, methylene blue and technological therapies for mental healthNot only do we age better," says de Havilland, "but we also avoid falling into those cycles of burnout and burnout that literally shorten our lifespan and our telomeres".
The British entrepreneur sums it up with scientific and emotional clarity: "It's not about living longer, it's about living with neural fulfilment. To be able to think, create, love and decide without feeling drained.


One clinic, one philosophy
Founded more than a decade ago in London, NAD Clinic has become a global benchmark for its holistic and scientific approach to wellness. Its products and treatments range from intravenous infusions of NAD+ and methylene blue to high-end nutraceuticalsprotocols, protocols for cognitive optimisation, cell rehydration, mitochondrial detoxification and customised programmes for longevity and mental performance.
"What we do is not just supplementing," De Havilland explains, "it's re-educating the body to regain its capacity for self-regeneration. When the cells work better, the mind is calmer too. And that balance is reflected in how we work, sleep and relate to others.
Prevention: the new wellness paradigm
NAD Clinic's social impact goes beyond regenerative medicine. Its collaboration with organisations such as The Real Mental Health Foundation aims to normalise the conversation about mental health and promote a preventive approach. "For years we have treated the symptoms, but not the causes of mental suffering," says De Havilland. "Prevention is about taking care of biology: optimising energy, reducing inflammation, improving rest. When the brain has what it needs, the mind finds balance.
Among his personal routines, Iain combines his monthly infusions with methylene bluwhich boosts brain function, and long walks, which he considers "the simplest and most powerful form of therapy". "Walking connects me to reality," he says with a smile. "Movement and conscious breathing are as important as any molecule.
Energy, science and humanity
In a world where productivity is often confused with success, De Havilland advocates a new definition of luxury: the sustainable mental energy. "The real wealth is not in having more time, but in having the energy and presence to enjoy it. If we take care of our biology, we also take care of our humanity.
NAD Clinic has established itself as much more than a supplement brand: a cellular wellness laboratory that unites science, technology and compassion to build the future of mental and emotional longevity.
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